code: def test_onset_strength_noagg():
      S = np.zeros((3, 3))
      librosa.onset.onset_strength(S=S, aggregate=False)
  
imports: import pytest
  from contextlib import nullcontext
  import os
  import warnings
  import numpy
  import librosa
  from test_core import srand
label_desc: Use image node_id 19 for calling a global function with example usage: test_onset_strength_noagg() without return types